[time-nuts] HP5370B anomaly

[Magnus Danielson]

Fellow Time-nuts,

When measuring a pair of OSA 8600 oscillators with a HP5370B I see an 
oscillating behaviour. It's a stable variation of about 5,5 s.
I have tried different settings but no luck. I've used the PPS as start 
and as External Arming. Very stable pattern.

None of the other counters show the same pattern for the same signal 
sources,

Have any other time-nut any good idea what it is?

Cheers,
Magnus